Cutting device



W. W. BRUST Oct 23, 1928.

CUTTING DEVICE 2 Sheets-She v Filed Jan. 18. 1927 INVENTOR W. W. BvushATTORNEY Oct. 23, 1928.

W. W. BRUST CUTTING DEVICE Filed Jan. 18, 1927 2 Sheets-Sheet Nam O M EGmm on COL.

J3 mi r a V i 9 m .N) AS m x lNVENTOR ATTORNEY Patented Oct. 23, 1928.

err

WALTER W. BR'UST, F WESTON, WEST VIRGINIA.

CUTTING nnvrcn.

Application filed. January 18, 192'?v Serial No. 161,902.

This invention relates to a cutting device for cutting strips of paperemployed in sealing boxes. I

An ob 'ect of the invention is the PIOV1S1OI1 of a device adapted to beassociated with a box sealing machine for cutting predetermined lengthsof glued paper which is adapted to seal the loose edges of a packingbox.

A further object of the invention is the provision of a cutting deviceadapted to be associated with a machine for sealing packages for cuttingpredetermined lengths of sealing strips, the device being adapted to beautomatically operated after a package has been passed beneath thecutting device.

This invention will be bestunderstood from a consideration ofthe'following detailed description, in view of the accompanying drawingsforming a part of the specification; nevertheless it is to be understoodthat the invention isnot confined to the disclosure being susceptible ofsuch changes and modifications which shall define no material departurefrom the salient features of the invention as expressed in the appendedclaims. v

Figure 1 is a side view in elevation of a cutting machine constructed inaccordance with the principles of my invention,

Figure 2 is a'rear view in elevation of the device, 7 o

Figure 3 is a horizontal section taken along the line 3,3 of Figure 1,

- Figure 4 isa plan view of the knife or cutting machine,

Figure 5 is a vertical section taken along the line 5-5 of Figure 4, V

Figure 6 is a vertical section taken along the line 6-6 of Figure 4,

' Figure 7 is a horizontal section taken along the line 77 of Figure 6,

Figure 8 is a fragmentary vertical section through the slide for holdingthe knife, and Figure 9 is a view in perspective of the switch andoperating arm controlling the circuit of a solenoid.

Referring more particularly to the draw ings 1O designates a supportingplate to which is secured a spacing plate 11 which co-operate with the.bars 12 to form tracks or guides 13 through which a paper 14 is adaptedto be moved. A second plate 15 is supported at the bottom of the plateby means of straps 16 which are secured at their upper ends, as shownat17, to the rear face of the plate 10 while the lower end of thestraps. are bent under as shown at 18 and secured to flanges 19projecting downwardly from the plate 15. The plate projects beyond theouter face of'the plate 10, as shown at 20, and the cutting edge 21 of.a knife 22 moves in close contact with the lower face of the plate 15,upon the flanges 18 and is guided by means of bolts 23 having theirupper ends secured to the plate 15 and movable through slots 24 in theblade 22. A spring 25 disposed between a washer 26 and a nut 27 on thebolt tends to maintain the blade in close contact with the plate 15.-The plate 15 has a passage 15 through which the paper is drawn.

The blade is actuated by means of the free end 28 of one arm of the bellcrank lever 29 projecting into an elongatedslot 30 of the blade 22, thebell crank lever being pivoted on a rod 31 carried by brackets 32secured to the bars 12. The upper arm '33 of the lever 29 has pivotalconnection at 34 with a link 35. A link 36 is pivoted at 37 to the upperend of the link 35. The lever 36 is rigidly connected with a squaredshaft 38 which when rotated oscillates the lever 36 for reciprocatingtheblade 32. A spring 39 secured to a horizontal bar 40 has its op--'posit-e end connected with the link to maintain the link in itsuppermost position and the blade 22 retracted in an inoperativeposition. v

A strap 41 is secured to the upper end of the plate 10 and is formedintegrally with the bar 40. second bar 42 is secured at 43 to one end ofa strap 41 and extends in parallel relation with the bar 40. The outerfree ends of bars and 42 provide bearings for the squared shaft 38, saidshaft having a crank 43 extending in parallel relation with armature 45pivoted on an axle 47 rotatably supported by the bar 40. and abar 48 disThis knife rests posed in parallel relation to the bar 40; The Y bar orbracket 48 is secured to the bar 40 by. i an integrally formed member 49which is secured at 50 to the bar 40. The inner end of the armature hasa toe 45 engaging a' stop 50 for limiting the outward tilted move: mentof said armature.

A plate or platform 51 is secured to the member 49 and provides asupport for a magnet 52. This magnet has a passage orcore 53 in whichis'adapted to be moved ,an

ios'f armature 54 secured to or formed integrally with the oscillatingmember 45. The magnetic coil 52 is provided with contacts 56 which areadapted to be connect-ed to a suitable source of current by. means ofwires 57. The supporting plate is slotted, as shown at 60, through whichare adapted to be moved a pair of rollers 61 carried by a shaft 62mounted in hearings in a pair of arms 63 of an oscillating member 64.The ends of the arm 63 are brought together, as shown at 65, and pivotedat 66 to a bracket 67 secured to the outer face of a plate 10. The upperends of the arms 63 are brought together and are pivotally connected, asshown at 68, to a reciprocating member 69 which is connected to somepart of the sealing machine whereby member 64 will be oscillatedperiodically. Adjacent the openings are located a pair of rollers 70mounted on a shaft 71 rigid therewith so that when said shaft is rotatedthe rollers will be revolved simultaneously. The shaft, as shown at 72,extends beyond one side edge of the plate and is provided with a gear orpulley 73 adapted to be revolved continuously during the operation ofthe sealing machine. I

The operation of my device is as follows: The cutting machine is adaptedto be employed in connection with my sealing machine for cuttingtransversely through strips of glued paper which are adapted to beemployed after moistening upon the loose ends of packing boxes. Thedevice is adapted to be periodically oscillated, particularly the member64 for moving the wheels 61 through the openings 60 for forcing thepaper 14 into contact with the revolving rollers '70 whereby the paperafter sealing is moved downwardly beyond the plate 15 which is inclinedat an angle to the horizontal so that the glued paper will be inposition for the cutting operation when the cutter is automaticallyoperated after a package has passed beneath said member.

The magnet 52 is connected by means of wires 57 to any suitable sourceof current so that when the circuit is automatically closed and themagnet is placed in circuit with the source of current the armature 54will be moved into the core 53 of the magnet and thereby raise the crank43. WVhen the crank 43 is raised the squared shaft 38 will be rocked,movingthe link 35 downwardly and likewise the arm 33 of the bell cranklever 29 so that the arm 28 is moved in a direction indicated by thearrow in Fig. 1,

whereby the blade 22 will be moved to the position shown in Fig. 6 andcut the paper. The circuit to the solenoid or magnet 52 is closed whenthe rear end of the package passes beneath the knife and a switch ofsaid circuit is operated by an arm dropping below the end of thepackage,the arm and switch being shown in Fig. 9.

When the circuit is open the spring 39 will come into action andforcethe armature 54 from its operative position with the coil 52 andraise the link 35, thereby oscillating the bell crank 29 to move theblade 22 back to its inoperative position.

After the paper has been cut and released from its connection with amoving package the paper will remain stationary. However,

at this time the link 69 is automatically oper-' ated, moving the frame64 inwardly towards the outer face of the supporting plate 10 fromwhence the roller 61 will be moved into engagement with the paper 14which is forced into engagement with the roller 70. At this time thefriction between the paper and rollers 61 and 70 and through therotation of the roller 70 causes the paper 14 to be moved downwardly andin position to be applied to the next preceding package. This action, ofcourse, is only momentarily and as soon as the paper has been moved downsufficiently to connect with an oncoming package the frame 64 will beautomatically moved out of the way and the paper will be drawn through aguide on the member 14 until the blade 22 is again brought into actionat the end-of the package for severing the paper 14. The automaticoperating means for switching on and ofif of the current is describedand claimed in my co-pending application, Serial No. 191,209, filed May13, 1927. g I

As has been stated the circuit of the solenoid is periodicallycontrolled by a switch mounted on a block 200 formed of somenonconducting material. The switch consists of two members 267 and 268which are spaced from each other through which is adapted to pass theswitch blade 269, the switch blade being carried by a reciprocating rod264 which is slidably mounted in supports 265 secured to the block 200.The switch blade 269 is adaptedto pass betweenzthecont-acts 267 and 268when the rod 264 is moving in the direction indicated by the arrow inFig; 9. When the rod is moved in a reverse direction the blade 269engages the inclined face 27 3 of the contact 268 andis moved to oneside so that it does not pass between the contacts 267 and 268 afterclosing the circuit through the wires 57 and 58 to the solenoid. The rod264 is reciprocated by means of link 263 and a rock shaft 264 mounted inbearings in the standard 261 and also by means of the rock arm 262 whichis adapted to be engaged by the package 35 as it is carried along by atraveling carrier not shown. When the arm 262 is moved to the dottedline position a 4 the frame, a link connecting one end of the Thispackage is carried by a traveling belt through a box forming machine andthe glued tape is applied to the box and then cut periodically by theknife when the arm 262 has been moved to the dotted line position. Theblade 269 is formed of resilient material so that it will spring pastthe contact 268 when the rod is shifted.

I claim:

1. In a device of the character described comprising a frame, a knifeslidably mounted in the frame, a track for guiding a strip of sealingpaper through the frame and transversely of the knife, means forreciprocating the knife comprising a solenoid, an armature adapted to beoscillated by the solenoid, a shaft operatively connected with andadapted to be rocked by the solenoid, a bell crank lever havingconnections with the knife, means connecting the bell crank lever withthe shaft whereby rocking of the shaft will cause oscillation of thebell crank lever and reciprocation of the knife, a roller locatedadjacent the strip of paper and adapted to be revolved continuously, anidle roller carried by the frame and adapted to be moved for forcingpaper in engagement with the revolving roller for periodically forcingthe strip of paper through the frame, and means for periodically movingthe idle roller into engagement with the paper.

2. A device of the character described comprising a frame, a solenoidcarried by the frame, an armature pivotally mounted on the frame andadapted to be actuated by the solenoid, a shaft rockably mounted in theframe and having a crank arm operatively connected with the armature, aknife slidably mounted in the frame, a lever rigid with the shaft, abell crank pivotally mounted on lever with one end of the bell crank,said knife being provided with a slot adapted to receive the free end ofthe bell crank whereby actuation of the armature causes rocking of theshaft and reciprocation of the knife.

3.21 device of the character described comprising a frame, a solenoidcarried by the frame, an armature pivotally mounted on the frame andadapted to be actuated bythe solenoid, a shaft rockably mounted in theframe'and having a crank arm operatively connected with the armature, aknife slidably mounted in the frame, a lever rigid with the shaft, abell crank pivotally mounted on the frame, a link connecting one end ofthe lever with one end of the bell crank, said knife being provided witha slot adapted to receive the free end of the bell crank wherebyactuation of the armature causes rocking of the shaft and oscillation ofthe knife, a track for guiding a strip of paper through the frame andtransversely .of the path of movement of the knife, and

means for periodically moving the paper through the track.

4. A device of the character described comprising a 7 frame, a knifeslidably mounted in the frame, a track carried by the frame and adaptedto guide a strip of sealing paper therethrough, means for pcriodicallymoving the strip of paper through the track and into operative relationwith the knife, and consisting of a continuously driven roller, saidframe being provided with an opening, and idling rollers normally out ofengagement with a strip of paper, and adapted to be moved through theopening for forcing the paper into engagement with the continuouslydriven roller, meansfor moving periodically said second mentionedrollers through the opening, and means for actuating the knife forcutting the strip of paper.

WALTERW. Bauer.

